Prader-Willi Syndrome (PWS)
Here's your citation in American Psychological Association (APA) format:
Prader-Willi Syndrome (PWS). (n.d.). In Alleydog.com's online glossary. Retrieved from: https://www.alleydog.com/glossary/definition-cit.php?term=Prader-Willi+Syndrome+%28PWS%29